#!/usr/bin/env python
# -*- coding: utf-8 -*-
# mod2.py 
PI = 3.14

class Math: 
    def solv(self, r): 
        return PI * (r ** 2) 


def sum(a, b): 
    return a+b 

if __name__ == "__main__": 
    print PI 
    a = Math() 
    print a.solv(2) 
    print sum(PI , 4.4)
